[jira] [Resolved] (HBASE-26856) BufferedDataBlockEncoder.OnheapDecodedCell value can get corrupted

["Nick Dimiduk (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-26856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nick Dimiduk resolved HBASE-26856.
----------------------------------
    Resolution: Fixed

> BufferedDataBlockEncoder.OnheapDecodedCell value can get corrupted
> ------------------------------------------------------------------
>
>                 Key: HBASE-26856
>                 URL: https://issues.apache.org/jira/browse/HBASE-26856
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Mohammad Arshad
>            Assignee: Mohammad Arshad
>            Priority: Major
>             Fix For: 2.5.0, 2.6.0, 3.0.0-alpha-3, 2.4.13
>
>
> In our production cluster we observed the cell value is modified after successful scanner read. After analyzing we observed OnheapDecodedCell is not created properly.
> We create OnheapDecodedCell with complete valAndTagsBuffer underlying array.
> {code:java}
>  return new OnheapDecodedCell(Bytes.copy(keyBuffer, 0, this.keyLength),
>           currentKey.getRowLength(), currentKey.getFamilyOffset(), currentKey.getFamilyLength(),
>           currentKey.getQualifierOffset(), currentKey.getQualifierLength(),
>           currentKey.getTimestamp(), currentKey.getTypeByte(), valAndTagsBuffer.array(),
>           valAndTagsBuffer.arrayOffset() + vOffset, this.valueLength, memstoreTS, tagsArray,
>           tOffset, this.tagsLength);
> {code}
> Here we are passing valAndTagsBuffer.array() for value extraction.
> The underlying array will be modified if it is altered anywhere. 



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